CoD 4 Firewall ports?

Hey, i've recently picked up Call of Duty 4 for the PC and I've discovered an issue. i live in a college dorm with wireless internet which is firewalled (we have no control over said firewall, it's to prevent pirating or some such) but it also blocks server access and other such features for online games.

o my question is what ports does CoD4 use for it's online multiplayer? I've looked online and haven't found any information. I need to know this so I can tell the tech support at my college to allow those ports to open so i can play the game.

Thanks in advance.. i really wanna play it soon ^_^